Self-cleaning needle-valve.



0. e. w. NITZ.

SELF CLEANING NEEDLE VALVE.

APPLICATION FILED JUNE 18. 19l8.

1,239,234.35, Patented Dec.;31, 1918.

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slightly conical as indicated at 12. The bore seat 13, and has its point lowing is a specification.

at its vouter end.

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Specification of Letters Patent.

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Application filed June 18, 1318. Serial No. 246,533.

To all whom it may concern:

Be it known that 1, CHARLES G. VJ. Nrrz, a citizen of the United States, residing at /V'auwatosa, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful lmprovementsin Self- Cleaning Needle-Valves, of which the fol- This invention relates to. needle valves, and more especially to those having valve cleaning features.

Primarily the invention consists in a main or inlet valve and a supplemental needle or outlet valve.

The invention also contemplates the employment of the supplemental .or needle valve as a sprayer, and furthermore it contemplates the use of a cleaning pin in the jet opening of the sprayer.

Another obj ectof the invention is to make provision for wear of parts.

Details are set forth in the following specification and claim, and attention is invited to the drawings wherein:

Figure 1 is a longitudinal sectional view of the entire valve,

Fig. 2 is a perspective The valve casin comprises a barrel 1 threaded internally and externally as shown and having at its forward end ahead 2. On the exterior thread travels a nut 3 which coacts with-the head and with'packing rings 4 which hold the barrel in the wall of any member where this valve is to be used. Onthe other endiof the barrel is a gland 5 containing packing 6, and through the same passes the valve stem 7 which is cylindrical and smooth at thispoint and has a handle 8 Further inward the valve stem is threaded as at 10, and yet further it while its tip is tapered or of the barrel at the inner end of its threaded portion is contracted to form a conical seat 13 for said tip, and through one side oi the barrel is an inlet 14. Beyond said seat 13, the bore of th barrel is again enlarged into a chamber which opens out the extremity of such barrel.

Seated rigidly in a socket 20 in the extremity of the stem is a needle 21 which projects loosely through the outlet 15 from the 22 dome shaped conical.

as shown in Fig. 2 or made detail of the needle The numeral 25 designates a cup-shaped needle casing which is adjustably secured to the inner end of the barrel by any suitable means, threads 26 being shown in the present instance in-the chamber and around thecasing for adjustably connecting these elements,

and internally this casing is provided with a tapered or conical seat 27 whosesmaller end communicates with a jet aperture 28. Flnally the tip of the needle point 22 carries a cleaner pin 29 preferably made flat on its extremity as seen in Fig. 2, and the size of tins pin is such that it does not completely close the jet opening 28.

The parts being assembled as seen, when the handle is turned to retract the stem 7 the tapered tip 12 of the same comes off the seat- 13 and permits liquid to flow from the nlet to said seat and through the outlet 15 into the interior of the cupped casing 25. At the same time that the stem 7 is retracted, the needle 21'is retracted with it and its tip 22 is unseated; and therefore the fluid withneedle will open to a lesser degree on ac count of the difference intaper of the valve seats 13 and 27, and therefore the fluid Within the cup is under some pressure and will be delivered through the jet aperture 28 in the form of spray, as it is broken up by the pin 29. Moreover, should the tapered tip 12 of the stem wear, or should the seat 13 wear, the flow of fluid through the aperture 28 will yet be controlled by the point 22 of the needle coacting with the seat 27 within the cup. extend to such a degree that it is found the needle only is functioning, sible to adjust the cup with respect to the valve casing or barrel so as to restore the relative position of parts. When the valve is again advanced to closed position, the pin is forced through the jet aperture in the direction of the flow of the fluid, and pushes out of the-same any accumulations, which may have occurred, and this pin is twofold, it fluid into spray at the jet next cleans said aperture each is closed.

therefore the use of v Should the wear it is quite posine p 11 The roregolng description and the draw- G ings have reference to what may be con- 'sidered the preierred, or approved, form of my invention. It is to be understood that'l may make such changes in construction and arrangement and combination of parts,

prove expedient and. fall within the scope of the appended claim.

Having thus fully described my invention, What Iclaim as new and desire to secure, by Letters Patent, is

' In a Valve of the class described, the combination with a barrel Whose bore is tapered threaded for adjustable mounting within saidchamber, the bottom of the cup being materials, dimensions, et cetera, as may manner:

conical internally to form a Valve seat in alinelnent with that mentioned and opening through the cup in a jet opening; of a stem longitudinally adjustable within said barrel and coacting with its seat to form a main 'valve, a needle seated in the end of the stem and projecting through the main valve and throughout the length of the cup and tapered atits extremity to contact with the seat in the cup, and a pin on the smallerend of the needle projecting through said jet opening.

In testimony whereof I aiiix my signature in presence of two witnesses.

CHARLES G. W. NITZ. 

